Attachment for pneumatic carpet-renovators.



Patented Dec; 3|; |9o|. J. s. THURMAN.

ATTACHMENT FOR PNEUMATIC CARPET BENOVATORS.

(Application filed June 22, 1901-) (No Model.)

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UNTTE I STATES PATENT FFICE.

JOHN S. THURMAN, OF ST. LOUIS, MISSOURI.

ATTACHMENT FOR PNEUMATIC CARPET-RENOVATORS.

SPECIFICATION forming part of Letters Patent No. 690,084, dated December 31, 1901. Application filed June 22, 1901. $erial1ilo, 65,704. (No model.)

To ttZZ whom it may concern.-

Be it known that I, JOHN S. THURMAN,a citizen of the United States, residing at the city of St. Louis, State of Missouri, have invented a certain new and useful Improvement in Attachments fol-Pneumatic Garpet-Benovators, of which the following is a full, clear, and exact description, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, forming part of this specification, in which Figure 1 is a side elevational view, partly in section, of my improved attachment applied to a pneumatic carpet-renovator. Fig. 2 is a similar view showing the parts in a different position. Fig. 3 is a bottom plan view; and Fig. at is an enlarged sectional view on line 4 4, Fig. 2.

This invention relates to a new and useful improvement in attachments to pneumatic carpet-renovators, the objects being to pivotally mount the handle on the renovator-casing, by which handle the renovator is moved backward and forward over the carpet to be cleaned, provision being made whereby said handle may be adjusted and locked in adjusted positions, so as to lift one edge of the renovator -casing off of the carpet being cleaned. It has been found by experience that the ordinary form of pneumatic carpetrenovator will not effectually remove the dirt from carpets which have remained on the floor for a number of years, so that accumulated dirt has caked therein, because part of the air-blast which is directed at an angle down into and through the carpet instead of lifting the dirt and carrying it up into the collecting chamber of the renovator will be deflected laterally and pass out under the edges of the easing into the room, carrying with it particles of dust. By lifting one edge of the casing, and particularly the rear edge thereof behind the nozzle through which the blast of air is emitted, a suction is formed behind the blast of air, which suction induces a circulation of air in the direction of the blast, and the induced air will flow in from the rear and side edges of the casing, and so prevent the dust-laden air from issuing at these points.

Vith these objects in view the invention consists in the construction, arrangement, and combination of the several parts, all as will hereinafter be described and afterward pointed out in the claims.

In the drawings, A indicates the casing of the renovator, which is provided with a duct or passage a for the dust-laden air, which duct or passage discharges into a chamber a, in which it is intended that the heavier particles of dust shall be deposited. The casing is provided with an opening in its top leading into a fabric bag, so that the air freed of the heavier particles of dust will be received in said bag (indicated at B) and escape through the meshes thereof, the meshes of the bag arresting the dust and preventing its passage into the exterior.

0 indicates the nozzle opening, which is made adjustable by plate 0, said nozzle-opening directing the air downwardly into and through the carpet to be cleaned. This nozzle-opening is located at the rear lower edge of the passage a.

D indicates a yoke or bail pivoted to the casing A at cl. This yoke has the operatinghandle E secured thereto, which operatinghandleis made hollow for the passage of compressed air. The handle is provided with a hand-grasp e at its outer end, in which is located a valve for controlling the amount of pressure admitted to the renovator. A flexible tube leading from some suitable source of compressed-air supply is connected to, the operating-handle. The inner end of the 0perating-handle is connected by a flexible tube F to the nipple, which extends rearwardly from the nozzle. Thus the operating-handle may be adjusted without disturbing the relative position of the blastnozzle to the casing.

Yoke D is provided with depending perforated lugs 0r ears d, in which is mounted a roller G. The forward ends of the yoke D preferably pass on each side of the renovatorcasing between stop-lugs a. As shown in Fig. 4, the casing is provided with a pocket or recess a, in which is located the springpressed ball a, said ball cooperating with recesses d in the inner faces of the prongs of the yoke, which recesses are so arranged and located that they will cooperate with the spring-pressed ball when the handle and its connected yoke are adjusted to different positions,this ball-and-recess construction locking the handle in such adjusted positions and preventingaccidentaldisplacement. As shown in Fig. 1, the spring-pressed ball cooperates with the lower recesses of the yoke, in which event the renovator can be used in the usual manner-that is, the lower face thereof contacts with the carpet to be cleaned, so as to completely inclose the air-blast. In Fig. 2 the handle has been depressed, sothat spring-pressed balls, there being one such ball on each side of the casing, are received in the upper recesses 01, in which event the roller G is brought into contact with the carpet to be cleaned by projecting below the rear edge of the casing, so that the rear edge of the casing is elevated. In this position of the renovator the air-blast is directed forwardly and upwardly,with its charge of dust, through the passage or and induces an inward circulation of air from the exterior under the side and rear edges, so that notwithstanding the caking of the dirt in the carpet there will be no tendency of the dust-laden air to pass out under the side edges. With respect to the forward edge it will be noted that the entire weight of the renovator is supported at two points, the roller G being one and said forward edge the other, and therefore the forward edge of the casing makes closer contact with the carpet and prevents the dust-laden air from escaping thereunder. This is obvious when it is considered that when the parts are in the position shown in Fig. 1 the great area of the entire bottom face distributes the Weight of the device evenly thereover, and consequently the contact of the lower face with the carpet is not as good at any point as it is along the edge of the front wall when the roller is utilized to elevate the rear edge of the renovator.

I am aware that minor changes in the construction, arrangement, and combination of the several parts of my device may bemade and substituted for those herein shown and described without in the least departing from the nature and principle of my invention.

Having thus described myinvention, what I claim, and desire to secure by Letters Patent, is-

1. In a pneumatic carpet-renovator or the .like, a casing having an open bot-tom adapted to rest over the carpet being cleaned, means for directing a blast of air into said casing, and means for elevating one edge of said casing above the said carpet while another edge of said casing remains in contact therewith; substantially as described. a

2. The combination with a pneumatic carpet renovator having an air=nozzle for direct ing a blast of air down into and through the carpet to be cleaned, of means for elevating the renovator so as to provide a space open to the exterior behind the blast, substantially as described.

3. In a pneumatic carpet-renovator, the combination with the casing having a passage at its forward end for the dust-laden air,

of a nozzle for directing a blast of air downinto and through the carpet to be cleaned,

, said nozzle being located at the rear edge of said passage, and means for supporting the rear end of the casing above the carpet being cleaned,whereby a space is provided through which an inward circulation of air is induced, substantially as described.

4. The combination with a pneumatic carpet-renovator having a blast-nozzle arranged in its rear end for directing a blast of air forwardly and downwardly into and through the carpet to be cleaned, of a roller for support ing the rear end of the renovator above the carpet, so as to provide a space for the purposes described, the other point of support of the renovator being the forward edge thereof, substantially as described.

5. The combination with apneumatic carpet-renovator having ablast-nozzle, of a pivoted handle provided with a passage for the supply of compressed air to said nozzle, and a flexible connection between said handle and said nozzle, substantially as described.

6. The combination with a pneumatic earpet-renovator having a blast-nozzle, of a yoke pivoted to said renovator, an operating-handle mounted upon said yoke and provided with a passage for supplying compressed air to the nozzle, and a flexible connection between said operating-handle and said nozzle, substantially as described.

7. The combination with a pneumatic carpet-renovator, of a yoke pivoted thereto, a roller carried by said yoke, and means for locking the yoke and its carried roller in adjusted positions, substantially as described.

8. The combination with a pneumatic carpet-renovator, of a roller designed to be projected below one end of the renovator for-elevating and supporting that end of the renovator above the carpet being cleaned, and means for locking said roller in adjusted positions, substantially as described.

9. The combination with a pneumatic carpet-renovator, of a yoke pivotally mounted thereon and provided with recesses, a roller carried by said yoke, and spring-pressed balls in the side walls of the renovator for cooperating with the yoke-recesses for locking the yoke and its carried roller in adjusted positions, substantially as described.

. 10. The combination with apneumatic carpet-renovator having a blast-nozzle arranged in its rear end for directing a blast of air downwardly and forwardly, of a yoke pivoted to the side walls of said renovator, a hani ing the same and its carried rollerin adjustto dle carried by said yoke, said handle being ed positions, substantially as described. provided with a passage for supplying com- In testimony whereof I hereunto affix my pressed air to the nozzle, a flexible connecsignature, in the presence of two witnesses,

5 tion between said handle and said nozzle, a this 20th day of June, 1901.

roller carried by said yoke which is designed JOHN S. THURMAN. to occupy positions above and below the bear- Witnesses: ing edge at the rear end of the renovator, and GEORGE BAKEWELL,

means cooperating with said yoke for lock- RALPH KALISH. 

